Background technology
It is more and more universal that mobile phone carries digital camera at present, and the resolution of digital camera is also more and more higher.This has created condition with regard to the application of making business card scan for the mobile phone of band digital camera.
The business card scan technology refers to that the mobile phone useful information such as name, address, postcode, telephone number, fax number, E-mail address that business card is contained with the band digital camera directly adds the technology in the address book of mobile phone to.Come the method for scanned business card to compare with traditional scanner that utilizes, the largest benefit of this technology is the task of above-mentioned interpolation useful information, and armrest machine and the digital camera that carries thereof just can be realized, do not need the additional scanning instrument.Realize that this Technology Need finishes following four steps: the digital camera that (1) carries with mobile phone is taken the image of business card; (2) with OCR (optical character recognition, optical character identification) technology discern automatically (1) step take the photograph business card image in literal; (3) find out the useful information such as name, address, postcode, telephone number, fax number, E-mail address in the literal of (2) step identification automatically with the text classification technology, and they are shown in the screen of mobile phone as recognition result; (4) cellphone subscriber checks recognition result, and after correcting mistakes and confirming, mobile phone adds the recognition result of confirming in the address book of mobile phone to automatically.This technology can have been save the trouble and the inconvenience of manual input apace with in the card information Input Address book.In four above-mentioned steps, (2), (3) and (4) are ripe prior arts, during enforcement without any difficulty.The task of step (1) is to photograph complete, picture business card image as far as possible greatly and clearly with the digital camera that mobile phone carries.With different with the scanner scanning business card; step (1) needs the cellphone subscriber to participate in shooting operation just to finish; and cellphone subscriber's camera work of not grasping in the majority; cause the business card image that finally photographs to contain " noise " in a large number through regular meeting; as distortion of projection; content is imperfect; picture is less than normal or image blurring etc.; as Fig. 1 (b); Fig. 1 (c) and shown in Figure 2; have a strong impact on the quality of the business card image that photographs; thereby badly influence the discrimination of business card scan; cause to automatically identify in the useful informations such as name that are mixed with a lot of mistakes in the literal that comes and find out with the text classification technology with the OCR technology also to be mixed with a lot of mistakes, the business card scan technology that the digital camera that utilizes mobile phone and carry can be realized has lost its practicality.
Below be that some attempt the in-problem prior art of settlement steps to deal (1).
The United States Patent Application20030133703 that people such as Lin-Chen Yu submit to has described a device that is used for fixing mobile phone and business card.Mobile phone and business card are fixed on this device, when the digital camera that carries with mobile phone is taken business card, can guarantee that the business card image that photographs does not have distortion of projection and when taking camera can not shake.The shortcoming of this technology is that the requirement cellphone subscriber carries an attachment device that utilization factor is not high.Before address, not needing attachment device is the big advantage that the digital camera that carries of mobile phone is realized business card scan, this technology is being lost ground the mobile phone of band digital camera aspect the realization business card scan.
The mobile phone of the band high-resolution digital camera that present many moneys are commercially available has the business card scan function, and one of them is exactly " bright " participants in a bridge game machine of Motorola.This mobile phone adopts another kind of method to take business card: the ad-hoc location on the screen of mobile phone has been drawn three red lines, and three limits of prompting mobile telephone set user business card when taking business card should overlap with described three red lines.When three limits of business card roughly overlapped with described three red lines, described red line became green line, and simultaneously the digital camera of mobile phone enters countdown period, when countdown finishes period, and the digital camera automatic shooting business card of mobile phone.The shortcoming of this technology is when taking business card with the digital camera of mobile phone, there is relative motion between digital camera and the business card, image on the screen of mobile phone is constantly changing, the cellphone subscriber both had been not easy to see clearly business card present located position, how not know business card to be overlapped mobile name card with described three red lines yet.
Summary of the invention
The objective of the invention is to release the method that a kind of mobile phone with the band digital camera is realized business card scan.This method is implemented in the mobile phone of band digital camera, has the business card scan function, does not but have the shortcoming of background technology.
For achieving the above object, the present invention by the following technical solutions.On the basis in (2) that keep above-mentioned background technology, (3) and (4) step, (1) step is improved: on the screen of mobile phone, detect the four edges wait to take the photograph business card, line drawing with first kind of color goes out the detected four edges of waiting to take the photograph business card, make the cellphone subscriber see position and the shape of business card on screen clearly, and move business card to be taken the photograph with arrow prompting mobile telephone set user along the arrow direction according to the current location of business card, enter to business card and be fit to the position taken; When the relative position of the digital camera of mobile phone and business card was fit to take, the four edges of described business card became second kind of color, and the prompting mobile telephone set user takes ready; The cellphone subscriber only need steadily hold mobile phone, and artificial or mobile phone starts " shooting " button of digital camera automatically, finishes the shooting of waiting to take the photograph business card, thereby has overcome the disadvantage that camera is easily shaken when taking.
Now be described with reference to the accompanying drawings technical scheme of the present invention, this scheme comprises seven steps, and wherein first and third and four steps are respectively shown in Fig. 4,5 and 6.
A kind of mobile phone with the band digital camera is realized the method for business card scan, comprises four steps: (1) takes the image of waiting to take the photograph business card with the digital camera that mobile phone carries; (2) with the OCR technology discern automatically (1) step take the photograph wait to take the photograph literal in the business card image; (3) find out useful information in the literal of (2) step identification automatically with the text classification technology, described useful information is name, address, postcode, telephone number, fax number, E-mail address, and they are shown in the screen of described mobile phone as recognition result; (4) cellphone subscriber checks recognition result, after correcting mistakes and confirming, mobile phone adds the recognition result of confirming in the address book of described mobile phone to automatically, this method needs to implement in the mobile phone of band digital camera, the camera system and the business card recognition system that contain Single Chip Microcomputer (SCM) system are arranged in described mobile phone, in the storer of described Single Chip Microcomputer (SCM) system, store following program, below carrying out, control and commander CPU guarantee the operation that this method can normally be implemented: wait that the image of taking the photograph business card is shown in described screen, angle point is shown in described screen, judge the edge of waiting to take the photograph business card, with first kind of color setting-out, draw arrow with first kind of color, judge the summit at angle and overlapping of angle point of waiting to take the photograph business card, with second kind of color setting-out, start " shooting " button, it is characterized in that, (1) in the step, the camera system in the described mobile phone is taken the image of waiting to take the photograph business card by following operation steps:
The first step, the alignment lens business card to be taken the photograph of the digital camera that described mobile phone is carried, described camera system will wait that the image of taking the photograph business card is presented on the screen of described mobile phone, and on described screen, showing four angle points respectively near four jiaos place, the summit that prompting mobile telephone set user business card to be taken the photograph is in four angles of waiting to take the photograph business card when being fit to the camera site should overlap with described four angle points respectively;
In second step, described camera system detects the four edges of waiting to take the photograph business card automatically;
The 3rd step went out the detected four edges of waiting to take the photograph business card of second step with the line drawing of first kind of color on described screen, and the direction of indicating business card to be taken the photograph to move with the arrow of first kind of color;
The 4th step, described camera system inspection is waited to take the photograph business card and whether is positioned at suitable camera site, as not, returned and carry out second step, in this way, go out to wait to take the photograph the four edges of business card with the line drawing of second kind of color on described screen, prompting mobile telephone set user business card to be taken the photograph is positioned at the position that is fit to shooting, can take, enter and carry out the 5th step;
In the 5th step, the cellphone subscriber differentiates the shooting setting of mobile phone, as is " the artificial shooting ", enters and carries out the 6th step, as be " automatic shooting ", enters and carry out the 7th step;
In the 6th step, the cellphone subscriber steadily holds mobile phone, by " shooting " button of described mobile phone, obtains waiting to take the photograph the image of business card;
In the 7th step, described camera system starts " shooting " button of described mobile phone automatically, obtains waiting to take the photograph the image of business card.
Technical scheme of the present invention is further characterized in that in the 3rd step, first kind of color is red, and in the 4th step, second kind of color is green.
Technical scheme of the present invention is further characterized in that when carrying out each step, described camera system is instructing the indicator term of cellphone subscriber's proper operation to be shown in described screen.
Method of the present invention is particularly suitable in the mobile phone of band digital camera, also can be used for taking the image of waiting to take the photograph business card in the mobile device of band camera.
Compare with background technology, the present invention has the following advantages:
1, by screen prompt, the guiding cellphone subscriber photographs the high-quality image of waiting to take the photograph business card.
Can allow the cellphone subscriber be clear that to wait to take the photograph the current location and the shape of business card, prompting arrow can allow the cellphone subscriber know clearly how to move by the detected four edges of waiting to take the photograph business card on described screen and wait to take the photograph business card and just can photograph qualified image.By screen prompt, the cellphone subscriber who guides any one not teach camera work photographs the high-quality image of waiting to take the photograph business card.
2, the automatic shooting function makes the camera of mobile phone take the image of waiting to take the photograph business card under the situation of not shaking, help to improve take the photograph the quality of image of waiting to take the photograph business card.
More than two advantages guarantee that described mobile phone can take the photograph to such an extent that do not contain any " noise ", the high-quality image of waiting to take the photograph business card, thereby guarantee the recognition accuracy of described business card recognition system and improve the availability and the ease for use of described business card recognition system.
Embodiment
Embodiment 1
Present embodiment is implemented in the mobile phone of the band digital camera with following technical indicator by " summary of the invention " described method fully:
The trade mark of mobile phone: dopod (Dopod) 830 types;
The resolution of digital camera: 2Mpix.;
CPU frequency of operation: 195MHz;
Memory span in the Single Chip Microcomputer (SCM) system: 44Mbit;
Screen diagonal length: 2.8in.;
Screen resolution: 320*240pix.;
Mobile phone operating system: the windows mobile 5.0 of Microsoft.
Embodiment 2
Present embodiment except for the following differences, remaining part and embodiment 1 are identical: in the 3rd step, first kind of color is red, in the 4th step, second kind of color is green.
Embodiment 3
Present embodiment except for the following differences, remaining part and embodiment 2 are identical: when carrying out each step, described camera system is instructing the indicator term of cellphone subscriber's proper operation to be shown in described screen.